Use with ATL MICRO3 fuses up to 20 AMP each slot! | Includes popular 5A Fuse! | Plugs into occupied or vacant energized fuse block slot. | Provides one fuse hlder to protect existing circuit, and a second fuse holder to protect new circuit | 16-gauge red wire lead for new circuit is 5 inches long; includes insulated crimp-type coupler butt connector.